Celery stalks that are immersed in "Solution $1"$ for several hours and become stiff and hard.

$*$Define the effects hypertonic and hypotonic solutions.

"Solution $1"$ is sugar water and "Solution $2"$ is hypertonic.

"Solution $1"$ is a high sugar solution and "Solution $2"$ is a high salt solution.

"Solution $1"$ is hypotonic and "Solution $2"$ is isotonic.

"Solution $1"$ is pure water and "Solution $2"$ is hypertonic.

"Solution $1"$ is a high salt solution and "Solution $2"$ is pure water.